Submarine torpedo-boat



J. BARRAJA-FRAUENFELDER.

SUBMARINE TORPEDO BOAT.

APPLICATION FILED SEPT 5. I919. RENEWED JULY 28, 192i.

1,393, 91, Patented ct 11,1921.

3 SHEETS-SHEET I.

m mm Jase v72 2522754 14 frauemfezier v BY 7 A'TTORNEY J.BARRAJA-FRAUENFEPDER.

SUBMARINE TORPEDO BOAT. APPLICATION FILED SEPT 5| I919- RENEWED JULY28,1321. 1,393,601. P nted Oct 11,;192L

s suing-sneer 2.

J. BARRAJA-FRAUENFELDER.

SUBMARINE TORPEDO BOAT.

APPLICATION FILED SEPT 5,1919- RENEWED JULY 28, 192i.

Patented Oct. 11, 1921.

3ISHEETSSHEET s.

boat.

UNI TED STATES PATENT OFFICE.

.rosnrn nnnnam-rnaunnrnrnnn, or nnrnenronr, connnorrour, assrenon To THELAKE ronrnno BOAT ooivrrnnr or nnrnenron'r, oonnnorrour, A con-]?ORATION 0F MAINE.

sUBMAnInr. ronrnno-noar.

Patented Oct. 11, 1921.

- Application filed September 5, 1919, Serial'No. 321,952. Renewedeuly28, 1921. Serial No. 488,287.

To all whom it may concern: l

Be it known that I, JOSEPH BARRAJA-FRAU- nnrnnnnn, a citizen of theUnited States, residing at Bridgeport, in the county of Fairfield andState of Connecticut, have invented new and useful Improvements inSubmarine Torpedo-Boats, of which the fol lowing is a specification.

Heretofore, in the construction of submarine torpedo boats installedwith after or stern torpedo tubes, it has been the practice to providefairwater doors for controll ng the torpedoexits in the hull so astoprovide smooth water surfaces on the sides ofthe In the constructionswherein the torpedo tubes are arranged in vertical alinement with thelongitudinal axisof the boat a so as to discharge directly through thestern,

two fairwater doors are employed and are arranged to open outwardlyprior to'the discharge of a torpedo. Such construct on, however hasbeenfound objectionable,-s1nce eddies are immediately formed the moment thedoors are opened which tend to retard the speed of the boat and todisturb the course of the torpedo since the water will back up into therecess formed by the open doors in an agitated condition. D

The object of the invention is to provlde a construction to avoidthe'above stated objections and one in which greater strength of thestern is provided, and greater protection isgiven the outboard or muzzleends of "the tubes, their covers andtheir operating gear than in the"constructions now :employed, the constructlon' and arrangement beingsuch that all gears and other operatmg mechanism employed for openingand closing the fairwater doors'are dispensed with.

The invention comprises' certain novel features of construction, andnovel combinations and arrangement of parts as will be hereinafter fullydescribed and then 'In the drawings, illustrating the invenclaimed.

tion, in the several figures of which like a diagrammatic side elevationof theafter end of a submarine torpedo boat embodying ofFig. 5. Fig. 5is a vertical longitudinal section drawn on the line 5-5 of Fig. 6,

the torpedo tube and its outboard or muzzle cover and itsoperating gearbeing shown in elevation. Fig. 6 1s a horizontal f section drawn onthe-line 6" -6 of F 5, the tube fairwater doors now employed forincasing the breech ends of the tubes, the doors being shown open indotted lines illustrating the formationof eddies that are set up whenthe doors are open. 1 1 designates the after endof the main hull of asubmarine or submersible torpedo boat whichis constructed, as usual, ofshell plating 2 and ribs 3 which are of sufficient strength to withstandthe external pressure incident to submergence. 4 designates the sternsection of the boat, likewise constructed of shell plating 5 and ribs 6,but since this section of the boat will be open to the surrounding bodyof water, as will be hereinafter described, and hence not subjectedto'exte rnal pressure, the plating and ribs are preferably of lighterweight material than that of the main hull. The end of the main hull 1,is closed by a bulk-head 7, through which is-extended the muzzle end ofa torpedo tube 8,-the said muzzle end being controlled by a cover 9,hinged to an arm 10, carried by a transverse shaft 11 mounted inbrackets 12 extending from the outer end of the tube. One'end of theshaft '11, is provided with a segmental worm wheel 13 which is meshed bya worm 14 carried at the outer end of an operatin shaft 15 extendedthrough the'bulk-hea 7 and operable from the breech end of the tube. The

worm-wheel and worm are shown in-dotted lines in Fig. 5 of the drawings,and are inclosed in a water tight casing 16 to prevent the introductionof I any foreign matter [which would tend to clog them. parts aresimilarly designated, Figure 1. 1s

The stern section 4, in addition to the plating 5 and ribs 6, isconstructed with a casting 16, comprising'a vertical post 17 to whichthe outer ends of the platings 5 are connected, said posthaving inwardlyextending dlverging arms 18, to whloh the ribs are also connected, thesaid arms having recesses in which theribs are seated. The stern post 17V is formed with a cylindrical flanged-opening" 18"of substantially thediameterof the periphery of the torpedo tube and havmg ts center locatediii-longitudinal alinement with the longitudinal center of said tube.The

platings5, between the post 17 and the after rib 6, and also the saidrib, are bowed outwardly as atto conform to theradius of the openinglS,thus providing a cylindrical SGCtlOlllll the stern as shown, and beitween the said rib 6 and its adjacent rib 6, the side, plates are'cutout as-at 19 so as to permit water to flow into and through the saidcylindrical section when the bOlli'filS 'in motion either upon or belowthe surface of the water. i 1. r u

In Fig.8, ofthe-drawings I show a slight modification of construction.in which the stern post is dispensed with but the side plates arebowedoutwardlyas at 20 in the same manner as that describedwith reference tothe construction. shown 1n the main figures of the drawings, the forwardends of the bowed sections being open to the water as at 20. Y 1

From the foregoing it will bee-seen that during the forward movement ofthe boat .water will enter throughthe -openings'19 for20- and run outthrough the cylindrical exit ofthe post 17 hence: avoiding the for-;rn'ationof-eddies as in the constructions-employing fairwater doors orin constructions wliereinrecesses or. pockets are formed in the-sidesof'the hull. orstern of the boat at rthe'muzzle ends of the torpedo tubesso that speednresisting tendencies and possible defiection of'thedirection of course of a tor- H .pedo when fired from a tube is avoided;

By my construction of the stern of 'a boat with a stern post and itsforlwardly ex tended arms, I providea more rigid structure than hasheretoforebeen devised, and by providing: the sides of the stern with.openings there is added the; furtheradvantage. of permitting readyaccessto-the' outboard or muzzle ends of. the tubes, their covers andoperating gear. struction I avoid the employment of oper-' Furthermoreby. myconating mechanism for opening and closing the fairwater do'orsandhence thepossible danger of discharging a torpedo when said doors are-closed,s1nce the torpedo w ll have, free exit when the outboard ormuzzle'cover of the 7 tube is opened.

.ln order to prevent the formation of eddies at the end of the torpedotube when .the door is closedI arrange a substantiallyconeshapefairwater shell. or casing 22 upon the outer face of the coveror'door 9-so'as to direct the. water through the opening 18'." and toprevent its backing up against the. cover or fdoor. The shell 'or casingis pro-. -vided with an opening to. receive the arm 10 of the cover.

hull for opening and closing the closure,

and .a tubular section formed in the stern inalinement-with saidtorpedotube, said tubular section being open at both ends to the surroundingbody of water, substantially as and for the purpose specified.

3. A submarine torpedo boat, comprising. a mam hull constructed to wthstand-the pressure incident tosubmergence and havinga stern sect oniopen tov the water of flotat1on,;sa1d stern section having a;cyllnidrical section open at both endsto the surrounding body of waterand serving as a torpedo ex1t and a torpedo tube arranged n the mainhull -1n allnement with sald cylindrical sectionand opening within saidsternsection. a 4. Asu-bmaririetorpedoboat, comprising ainain hull,constructed to withstand. the pressure incident to submergence and hav-"ing a stern section I open'to the water of flotatiomi acylindricalsection formed in said stern providing a torpedo exit, thesides of said stern section having openings arranged therein in advancevof said cylindrical. .section, and a torpedo tube arrangedin" the mainhull of the boat in longitudinal aline- .jmentwith said cylindricalsection, and opening, into the stern sect1on,.a closure for themuzzle-end of said-tube, and means operable the position of saidclosure. 1

5. A submarine. torpedo boat, having a torpedo vtube opening :through.the Jstern from within themainhull for controlling *thereof, acylindrical section formed in said stern in longitudinal .alinement.with [said tube, said cylindrical section being open-at both endsto thesurrounding body of water, a closure for the muzzle end of the tube, andmeans operable from within-the boat for controlling the position of saidclosure.

6. In a submarine torpedo boat; a main hull constructed to. withstandthe pressure incident to. 'submergence, and, a stern sec- 'tion formedintegral therewith. and open to the surrounding bodyof water, said sternsection, comprising a stern .post provided with forwardly extendingarms, ribs carried by said"arms,, and shell platings connected to saidstern post, to said arms, and to said ribs. i

A submarine torpedo boat, comprising a main hull constructed towithstand pressure incident to submergence, a stern section ofrelatively light Weight material formed on the end of the main hull andopen to the surrounding body of water, a torpedo tube arranged in saidmain hull and opening into said stern section, a cylindrical sectionformed in said stern in longitudinal alinement with said torpedo tube,said cylindrical section being open at both ends to the surrounding bodyof water, a closure for the muzzle end of the torpedo tube, and meansfor operating said closure.

8. A submarine torpedo boat, comprisin a main hull section constructedto withstand pressure incident to submergence, and a stern section opento the surrounding body of water, said stern section comprising a sternpost having aoylindrical opening and forwardly extending arms, ribsconnected to said arms, and shell platings connected to said stern post,arms and ribs, said shell platings having bowed sides conforming to theshape of said stern post opening and having openings in advance of saidbowed portions, a torpedo tube arranged in the main hull section inlongitudinal alinement with said stern post opening, a door for closingthe muzzle end of said torpedo tube, and means operable from within themain hull for opening and closing said door.

9. A'submarine torpedo boat, having a torpedo tube opening through thestern thereof, a closure for the muzzle end of the tube, a cylindricaltorpedo exit formed in the stern section of the boat and open at bothends to the surrounding body of water, and a fairwater shell or casingcarried by the torpedo tube closure.

10. A submarine torpedo boat, having a torpedo tube opening through thestern thereof, a closure for the muzzle end of the tube, a cylindricaltorpedo exit formed in the stern of the boat and open at both ends tothe surrounding body of water, and a substantially cone-shape fairwatercasing or shell carried by the torpedo tube closure.

In testimony whereof I' have hereunto set my hand this 22nd day ofAugust, A. D. 1919.

JOSEPH BARRAJA-FRAUENFELDER.

Witnesses:

F. S. GoonELL, EMERY W. EATON.

